circle(w,h,clr)
  width:w;
  height:h;
  border-radius: 50%;
  background-color: clr;
  display: flex;
  justify-content: center;
  align-items: center;

btna(w, h, clr)
  width:w;
  height:h;
  border-radius: unit(h/2, unit(h));
  background-color: clr;
  display: flex;
  justify-content: center;
  align-items: center;

col-layout(n, gw)
  columns n
  column-gap gw
  & > *
    break-inside: avoid;
    -webkit-column-break-inside: avoid;

w(x)
  width: unit(x, 'px');
h(x)
  height: unit(x, 'px');
